Vulnerability-Lookup

OPENSUSE-SU-2023:0101-1

Vulnerability from csaf_opensuse - Published: 2023-05-02 07:36 - Updated: 2026-09-20 19:45

Summary

Security update for pdns-recursor

Severity

Important

Notes

Title of the patch: Security update for pdns-recursor

Description of the patch: This update for pdns-recursor fixes the following issues: pdns-recursor was updated to 4.6.6: * fixes deterred spoofing attempts can lead to authoritative servers being marked unavailable (boo#1209897, CVE-2023-26437) Fixes in 4.6.5: * When an expired NSEC3 entry is seen, move it to the front of the expiry queue * Log invalid RPZ content when obtained via IXFR * Detect invalid bytes in makeBytesFromHex() * Timeout handling for IXFRs as a client Fixes in 4.6.4: * Check qperq limit if throttling happened, as it increases counters * Failure to retrieve DNSKEYs of an Insecure zone should not be fatal * Resize answer length to actual received length in udpQueryResponse

Patchnames: openSUSE-2023-101

CVE-2023-26437

5.3 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

Recommended 6 products

Product	Version	Remediation
Unresolved product id: SUSE Package Hub 15 SP4:pdns-recursor-0:4.6.6-bp154.2.6.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Package Hub 15 SP4:pdns-recursor-0:4.6.6-bp154.2.6.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Package Hub 15 SP4:pdns-recursor-0:4.6.6-bp154.2.6.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.4:pdns-recursor-0:4.6.6-bp154.2.6.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.4:pdns-recursor-0:4.6.6-bp154.2.6.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 15.4:pdns-recursor-0:4.6.6-bp154.2.6.1.x86_64	—	Vendor Fix

Threats

Impact moderate

References

8 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://lists.opensuse.org/archives/list/security…	self
https://lists.opensuse.org/archives/list/security…	self
https://bugzilla.suse.com/1209897	self
https://www.suse.com/security/cve/CVE-2023-26437/	self
https://www.suse.com/security/cve/CVE-2023-26437	external
https://bugzilla.suse.com/1209897	external

JSON

To clipboard

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CVE-2023-26437 (GCVE-0-2023-26437)

Vulnerability from cvelistv5 – Published: 2023-04-04 14:37 – Updated: 2025-02-13 16:44

Title

Deterred spoofing attempts can lead to authoritative servers being marked unavailable

Summary

Denial of service vulnerability in PowerDNS Recursor allows authoritative servers to be marked unavailable.This issue affects Recursor: through 4.6.5, through 4.7.4 , through 4.8.3.

Severity

3.4 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-13 16:31 UTC

CWE

Denial of service
CWE-400 - Uncontrolled Resource Consumption

Assigner

OX CNA under the mitre root

CNA scorecard C 61/100 over 74 records in the last 180 days details

References

3 references

URL	Tags
https://docs.powerdns.com/recursor/security-advis…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…

Impacted products

1 product

Vendor	Product	Version
PowerDNS	Recursor	Affected: 0 , ≤ 4.6.5 (range) Affected: 0 , ≤ 4.7.4 (range) Affected: 0 , ≤ 4.8.3 (range)

Show details on NVD website

JSON

To clipboard

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        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IHPD6SIQOG7245GXFQHPUEI4AZ6Y3KD6/"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Upgrade to PowerDNS Recursor 4.6.6, 4.7.5 or 4.8.4. \u003cbr\u003e"
            }
          ],
          "value": "Upgrade to PowerDNS Recursor 4.6.6, 4.7.5 or 4.8.4."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Deterred spoofing attempts can lead to authoritative servers being marked unavailable",
      "x_generator": {
        "engine": "Vulnogram 0.1.0-dev"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
    "assignerShortName": "OX",
    "cveId": "CVE-2023-26437",
    "datePublished": "2023-04-04T14:37:29.388Z",
    "dateReserved": "2023-02-22T20:42:56.090Z",
    "dateUpdated": "2025-02-13T16:44:54.374Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OPENSUSE-SU-2023:0101-1

CVE-2023-26437 (GCVE-0-2023-26437)

Tags

Sightings

Nomenclature

Related by attack behaviour